Dear friend,

Recently my customer requesting GR&R study for the electrical tester (rotation balancing tester). This tester build with it's own software to capture the value in RPM and it will show whether it is accept or Reject. My customer was requesting to conduct variable instead of attribute study. i believe the intention is to see whether the tester able to give the same value for Repeatability and reproducibility.

i would like to know, Is it variable study (MSA) is applicable for electronic tester or different method should use to evaluate the tester precise

If you have a sample of conducting a study for the electronic tester, do share with me

Appreciate your help

periannan :confused:

I am going to provide some comments:

Comment one:
The Gage R&R shall be applied to the “Operational Definition” of your process.
In this case you measure RPM and RPM happens to be a continuous variable. The customer expectation is that you are going to protect them by making sure your measurement system provide you with a reliable means of screening quality (i.e. your promised to the customer with regards the expected product characteristic the customer is looking for and paying for)

As a customer, if you pay for 2 pounds of cheese, you don’t want to get 1 pound instead.


Comment two:
If you decide to create “Good Known Parts” and “Bad Known Parts” and then do an attribute gage R&R … you are going to lose information. Discrete data always tell you less.

Comment three:
The Gage R&R shall not be for the customer; you shall be looking forward to do Gage R&R on all your measurement systems. “This stuff can same you a ton of money”


Comment four:
I don’t have a mental picture of the machine you are dealing with, but in general, you;

a) Select parts that fall within your specification limits (i.e. you want parts that fall in the region in which the measurement error estimate is going to be made).

b) Perform the Gage R&R.

Hope this helps …